Boat-launching device.



Patented Nov. 21, 1916.

2 SHEETS-SHEET I.

A. E. J. LUCKHURST.

BOAT LAUNCHING DEVICE.

APPLICATION FILED 00120, 19:5.

Inventor y flllen/ EJL ucickuns-i Alt A. E. J. LUCKHURST. son LAUNCHING DEVICE.

APPLICATION FILED OCT. 20. 1915.

2 SHEETSSHEET 2.

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ALLEN E. J". LUCKHURST, OF RIDGEWQOD, NEW J BOAT-LAUNCHIN G DEVICE.

Application filed. October 20, 1915.

To all to 7mm it may concern Be it known that I, ALLEN E. J. LUCK- nc'as'r, a citizen of the United States, residing at ltidgewood, in the county of Bergen and State of New Jersey, have invented a new and useful Boat-Launching Device, of which the following is a specification.

This invention relates to life boat launching devices; and has for its object to provide apparatus with which life boats can be launched from the deck of a ship in a safe and certain manner in any kind of a sea.

The invention is illustrated in the accompanying drawings, in which Figure 1, is a plan view of a portion of the deck of a ship with the clavits in place, and my improved launching device applied thereto; Fig. 2, shows one of the davits in elevation, with my invention applied thereto; Fig. 3, is an elevation, partly in section, of a retaining standard I may use; Fig. d, is an enlarged view, in elevation, of the, gearing I may use,the same being mounted on the da-vit, and a part of the casing being removed to show the same; and, Fig. 5, is a sectional elevation of a part of the hoisting apparatus.

In the drawing, like numerals of reference refer to the same parts in each of the views.

In practice I mount on each davit 6, operative gearing, which I have described and claimed particularly in a companion application which 1 have executed this day preparatory to obtaining Letters Patent of the United States thereon; and, which, as shown, consists of a worm gear 7, mounted on the davit 6, and carrying the casing 8, which carries the worm 9, on a shaft 10, having fixed thereon a gear 11, in mesh with a pinion 12, on a shaft 13, which may be detachably connected with a shaft 14, which passes through an eye 15, in a part 16, removably mounted on a standard 17, which is fixed on the deck of the ship, as shown in Fig. 1, said part 16, being held in place by a bolt 18, passing through the same and into the standard 17, as clearly shown in Fig. 3.

In practice the eye 15, is made oblong, as shown, and greater in width than the diameter f the shaft 14, as clearly shown in Fig. 3, so that the shaft 14, will not bind in the eye 15, ofthe eyelet piece, or part 16, no difference how much the davit 6, may sway from the movement of the ship, as will be understood. We thus see that provision is made to hold the operating shaft of the Specification of Letters Patent.

Patented Nov. 21, 1916. Serial No. 56,886.

davit-turning gearing in substantially. fixed relation on the ship without danger of binding.

In practice I prefer to provide two eyelet pieces 16, on each standard 17, and lead through the same respectively the shafts 1 1, from adjacent davits, as clearly shown in Fig. 1. Where this is done the shafts 1 1, should be of different length so that a crank 19, mounted on either shaft will not interfere with the movement of the crank on the other shaft, as will be clear from an inspection of Fig. 1.

I also provide a hoisting device 20, which I mount on the deck of the ship back of each standard 17. This hoisting device is par ticularly described and claimed in a companion application which I have prepared this day and executed to file in the United 5.

States Patent Office. As shown here, two shafts 21, and 22, are used, mounted on a base 23, which is secured to the deck of the ship. Each of the shafts 21, and 22, have fixed thereon respectively worm gears 24, and 2-5, both of which are in mesh with a single worm 26, mounted on a shaft 27, on the end of which may be mounted a crank 28, with which the worm 26, may be rotated thereby rotating both shafts 21, and 22; and the shafts 21, and carry on their opposite ends drum ends 29, which are so positioned that a pair of drum ends in operative relation to each other are at the opposite sides of the base 23, as clearly shown in Fig. 1. Thus the rope 30, leading from the falls 31, may be rove through an eyelet 32, on the davit, and through another eyelet 33, on the deck of the ship to the respective pair of drum ends whereby the falls may be operated to raise, and lower one end of the respective life boat 34, as will be understood.

The operation is as follows: One of the life boats 34, is lifted from its chocks by the rotation of the, drum ends 29, at the opposite ends of the shafts. As these drum ends form a part of the hoisting device located well within a point of safety from the side of the ship there is no danger of any of the operators being lurched into the sea. When the boat is raised to the required height, the shafts 1 1, are operated with the respective cranks 19 thereby operating the gearing mounted on the respective davits 6, causing the davits to rotate, as desired, to carrythe boat outward beyond the side of the ship, as will be understood, so it can be lowered.

In hoisting the life boat from the sea the action of the gearing on the davit is reversed, but the action of the hoisting device is the same as in lifting the life boat from the chocks.

It will thus be seen that I have provided a launching device for life boats which can be operated entirely from safe positions on the deck of the ship thereby eliminating any danger of losing any of the operators either in hoisting, or lowering the life boat. At the same time I have provided means to hold the operative means for the davits in fixed relation to the deck of the ship without any danger of binding thereby rendering the davit inoperative, or causing breakage under strain.

I have provided the joint 35, connecting the shafts 13, and 14, for the purpose of disconnecting these shafts should the gearing on the davit get out of order, when the davit can be operated as an ordinary davit, and I have provided the removable eyelet pieces 16, so that in case of accident the shaft can be released from the standard, and used as a handle to push the davit around, as will be understood. I do not limit myself to a standard with a detachable eyelet piece, as it is evidentthe eyelet piece need not be detachable to make a workable device. It is necessary, though, to have an eye in the standard larger in size than the diameter of the operating shaft held therein to remove strain; and this eye is made greater in length than width to give the shaft 14, necessary freedom of move ment vertically.

By having the hoisting device with two pair of drum ends operative with a single crank, the adjacent ends of the life boats can be raised simultaneously, as will be understood; and the construction is such that either life boat can be raised, or lowered without operating the other, as will also be understood. By having the two eyelet pieces 16. on the same standard, and this standard adjacent to the hoisting device, the adjacent davits can be operated without requiring the seamen to travel any distance along the deck; and the hoisting device is also in a handy position for operating.

I claim: v

1. A boat launching device comprising gearing mounted on the davits, operative shafts leading from said gearing to the deck of the ship, means to yieldingly hold said shafts above said deck, and means to operate the falls independently of said davitoperative means.

2. A boat launching device comprising gearing mounted on the davits, operative shafts leading from said gearing to the deck of the ship, a standard adapted to yieldingly hold said shafts above said deck, and means to operate the falls independently of said davit-operative means.

3. A boat launching device comprising mechanical means to operate the davits, a stay adapted to hold said mechanical means in fixed but yielding manner relative to the deck of the ship, and mechanical means mounted on the deck of the ship to raise and lower the life boat through said davits.

4. In a boat launching device, a davit carrying falls, gearing mounted on said davit, an operative shaft connected with said gearing and projecting over the deck, a standard having an elongated eye through which said shaft passes, and a hoist mounted on the deck of the ship adapted to operate said falls.

A boat launching device comprising davits carrying falls, gearing mounted on each davit, an operative shaft connected with the respective gearing, a standard fixed on the deck of the ship said standard having an elongated eye through which one of the shafts passes whereby the shaft is held over the deck of the ship, and a hoist mounted on the deck of the ship adjacent to each davit and adapted to operate the falls on the same.

6. In a boat launching device, a davit, gearing mounted on said davit, an operative shaft connected with said gearing, and a standard fixed on the deck of the ship, said standard having an elongated eye through which said operative shaft passes, said eye being greater in width than the diameter of said shaft, for the purpose set forth.

7. In a boat launching device, a davit, gearing mounted on said davit, a shaft removably connected with said gearing, and a. standard fixed on the deck of the ship, said, standard having a removable eyelet with an elongated eye therein through which said operative shaft passes, for the purpose set forth.

8. In a boat launching device, a standard forming a stay for a part of the operative mechanism, said standard carrying two eyelet pieces each of which is provided with an elongated eye, and a bolt detachably connecting said eyelet pieces with said standard, for the purpose set forth.

9. The combination with a rotatable boat davit, of a gear mounted thereon, a pillar adjacent said davit, and a revoluble shaft having a flexible connection withsaid pillar and adapted to impart movement to said gear. 1

Dated this 19th day of October, 1915.

ALLEN E. J. LUCKHURST.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

